This is a collaboration product between "Frixion Ball Knock Zone x Heralbony." This erasable ballpoint pen, featuring the "Untitled / Ryo Nakao" design, was released in limited quantities in May 2024 (6 types in total). The box has some damage due to long-term storage at home. Please purchase only if you do not mind the condition of the outer box. Mechanism: Clip slide knock type Ball diameter: 0.5mm (extra fine) Ink: Premium Frixion ink (water-based gel ink) Color: Black *Complete decolorization temperature: around 65°C Body design: "Untitled" / Ryo Nakao ★ Brand new, unopened ★ Immediate purchase OK ★ Ships within 24 hours